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Buying a used 2021 GMC Sierra 3500? Check these 5 recalls first
Two critical recalls define this year: a brake module fire risk that came with a park-outside advisory until repaired, and diesels whose rear wheels can lock. Seat belts appear twice, as an unsecured center bracket and as wrong bolts, alongside a tailgate that can unlatch by itself. Complaint activity is modest at 20 unverified NHTSA reports with no crashes, fires or injuries recorded; power train, brakes and electrical are the main areas.
Before you buy
- Get the 17-character VIN from the seller and run it at nhtsa.gov/recalls. It shows which recalls are still unrepaired on that exact car.
- Get written confirmation the brake module fire recall was repaired before garaging the truck
- Verify the diesel rear-wheel-lock recall on the VIN
- Ask about both seat belt recalls and inspect the center belt bracket and anchor bolts
- Open recalls are repaired free at any GMC dealer, whoever owns the car — an open recall is a to-do item, not a bill.
Recalls covering the 2021 GMC Sierra 3500
| Recall | Area | Severity |
|---|---|---|
| Chevy Silverado and GMC Sierra HD Brake Module Fire Risk · park outside | Service Brakes, Hydraulic | critical |
| Chevy, GMC and Cadillac diesels: rear wheels can lock | Power Train | critical |
| Chevy and GMC trucks: center seat belt bracket unsecured | Seat Belts | high |
| GM cars and trucks may have wrong seat belt bolts | Seat Belts | high |
| Chevy and GMC heavy-duty tailgate can unlatch by itself | Latches/locks/linkages | medium |
What owners have reported to NHTSA
20 complaints filed for this model year. Complaints are unverified owner reports, and popular models collect more of them simply because more are on the road.
| Problem area | Complaints | Recall in this area? |
|---|---|---|
| Power Train | 7 | Yes |
| Brakes | 5 | Yes |
| Electrical System | 4 | None found |
| Engine | 3 | None found |
| Fuel System | 2 | None found |
| Visibility And Wipers | 1 | None found |